Patents by Inventor Sldlgata V. Sreenivasan

Sldlgata V. Sreenivasan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7504268
    Abstract: The present method features an active compliant pin chuck to hold a substrate, having opposed first and second surfaces, and compensates for non-planarity in one of the surfaces of the substrate. To that end, the method includes creating a point contact on the first surface to generate a change in shape of the second surface to obtain a desired shape of the second surface. The desired shape may be smooth, if not substantially planar or any other shape desired within the operational parameters of the chuck and the substrate. For example, the method may compensate for non-planarity due to particulate matter on the first surface and substrate topography. These and other embodiments are discussed more fully below.
    Type: Grant
    Filed: May 25, 2005
    Date of Patent: March 17, 2009
    Assignee: Board of Regents, The University of Texas System
    Inventors: Mahadevan GanapathiSubramanian, Sldlgata V. Sreenivasan